Bolt mechanism for doors.



C. A. BERRY.

BOLT MEGHANISM POR DOORS.

APPLICATION FILED JUNE 2i, 1913.

Patented Feb. 3, 1914.

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x o. LW ill JYNESSES A tto may C. A. BERRY.

BOLT MEOHANISM FOR DOORS.

APPLIUATION FILED JUNE 21, 1913.

Patented Feb. 3, 1.914.

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En sfrarns PATENT ornee CHARLES A. BERRY, OF STANFORD, CONNECTICUT, ASSIGNOR TO THE YALE & TOWNE MANUFACTURING COMPANY, 0F STAIVIFORD, CONNECTICUT.

BOLT MECHANISM FOR.DOORS.

` Speciication of Letters Patent.

Patented Feb. 3,1914.

Original application filed December 26, 1912, Serial No. 738,623. Divided and this application filed June To all 'whom t may concern Be it known that I, CHARLES A. BERRY, of Stamford, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Bolt Mechanism for Doors; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in bolt mechanism for doors, and particularly for hollow metal doors and is a division of application No. 7 38,623 filed by me December 26th, 1912.

In the use of hollow metal doors, it has been found that when a fire occurs, the heat causes the door to warp away from thejamb sufhcient to allow the flames to pass through into the next room, and the object ofthis improvement is to provide the door with safety bolts, in addition to the usual spring latch, the safety bolts being normally held out of action by a fusible device, so that in the event of a fire, the heat will melt the fusible device and release the safety bolts mechanism.

A further object is to provide a safety or supplemental bolt mechanism with mechanical means for holding the safety bolts retracted after the safety bolt mechanismhas been released from the fusible device, and when the door is open.

My invention further consists in the parts and combination of parts as will be more fully explained and pointed out in the claims.

In the accompanying drawings; Figure 1 is a view in longitudinal section of a door stile with my improvements attached thereto; Fig. 2 is a view in transverse section looking down from the line A, A, Fig. 1; Figs. 3 and 4 are views in section showing the trip for holding the safety or secondary bolts in retracted position, and for releasing them as the door assumes its closing position; Fig. 5 is a view in side elevation and Fig. 6 a view in section of the mechanism adapted under normal conditions -to hold the secondary bolts retracted both when the door is open and also when closed, and Figs.

Serial No. 775,156.

7. and 8 are views in side elevation and section respectively of a modification of the means` shown in Figs. 5 and 6.

The door is preferably hollow, and mounted in the stile 1 thereof, are a series of bell crank levers 2. These levers 2 are each pivotally mounted on a bracket 3 secured to the inner face of the outer edge of the stile, and each is pivotally connected at its upper end as at 4, to an auxiliary bolt 5. In the present instance, I have shown three auxiliary bolts, but the number used is unimportant. rIhe lo-wer end of each bell crank lever 2 is pivotally connected to the lifting bar 6, so that when the latter is moved vertically, all the bell crank levers 2 will be turned in a direction to retract the auxiliary bolts 5, and when the bar 6 is released, its weight will shift or operate the entire series of bell cranks in a direct-ion to project the bolts 5. The lifting bar 6 preferably extends from a point just below the top bolt, to a point just below the lower bolt. The bolts 5 pass through holesin the outer edge of the stile, and when retracted rest flush with or slightly within the outer wall of the stile so as to permity the door to fully close.

7 is the main latchbolt normally projected by the spring 8, and having a slot in its rear end through which a pin on the vertical arm of the bell crank lever 9 rests, the slot in the shank of the bolt permitting the bolt to be forced inwardly without moving said lever, and without actuating the lifting rod.

VThis lever 9 is pivoted to the stile, and is connected at 10 to the tail piece ll, which latter rests on the roll back 12a of the lock. The free end of the horizontal arm of the bell crank lever 9 rests under the pin 13 carried by bracket 14 secured to the lifting bar 6.

From the foregoing it will be seen that if the roll back be turned by a knob, the tail piece 1l will be lifted, and the lat-ter, by its engagement with bell crank 9 turns the latter in a direction to retract latch l1, and by the engagement of the lever 9 with the pin l13 on bracket 14, elevates the lifting bar, which, through its connections with the several bell crank levers 2, retracts the entire series of auxiliary bolts. As soon as the knob is released the weight of the lifting bar 6, together with the Vpressure of the spring 8 operates'to project the latch 7 and the entire series of auxiliary bolts.

One of the main features of my invention is the provision of means for normally hold` ing the auxiliary bolts retracted, so that the latter are never projected except under abnormal conditions. One form of mechanism is shown in Fig. 1, and also in Figs. 5 and 6, and comprises a latching lever 15 pivoted at 16, and provided at the free end of one of its arms with a shoulder 17 adapted to engage t-he free end 18 of the uppermost bell crank 2, as shown in full lines in F ig. 5. The other and shorter arm of the lever 15, is provided at its free end with the side enlargements 19 which latter are engaged by the tripping levers 20. The hub of one of these levers 20 is mounted in the outer face of the door, and the other is mounted in the inner face, and each is provided with a spring 21 which normally tends to force the tripping levers in a direction to move the latching lever 15, out of contact with the upper end 18 of bell crank lever 2, and thus Vrelease the lifting bar 6, which, as soon as released, projects all the auxiliary bolts. Secured to the outer end of the huh of each lever 20, is an arm 20C, to the free end of which a sheet metal link 22 is pivoted, and pivotally mounted on studs 23 secured respectively to the inner and outer faces of the doors are the metal links 24. In assembling the parts the levers 2O are turned to put their springs 21 under tension, after which the links 22 and 24 at each side of the door are secured together by a solder which melts at a low heat. F rom this it will be seen that under normal condition both tripping levers 20 will be held out of contact with latching lever 15, thus permitting the latter to dog the end 18 of the upper bell crank lever 2 and thus hold the liftingbar elevated and 'all of the auxiliary bolts retracted. If however, an abnormal heat should develop at either side of the door, the solder connecting the links 22 and 24 on the side subjected to the heat,

would melt thus disconnecting the links yand leaving the lever 2O thus released, free to turn-under the action of its spring 21, and engaging its extension 19 of latching lever 15,*throw the latter to the position shown in=dotted lines in F ig. 5, thus releasing the end 18 of bell crank lever 2 and permitting the lift-ing bar to drop by its own Weight and project all the auxiliary bolts. Instead however of having the trip levers cooperate with one of the bell `cranks carrying the lifting bar 6, they may act upon a hook which cooperates 'directly with the lifting bar as shown in Figs. 7 and 8. In this construction `the hubs or shafts of the trip levers 2Oa pass through the opposite side walls of the door, andcarry links 22a, adapted to be secured by solder to similar links 24 pivoted to the door as previously explained. The levers 2Oa are each provided with a spring 21, and are located in position to engage the extensions 19a on the hook 26. This hook is pivotally mounted in a position to carry its hook under the shoulder 27 at the upper end of the lifting bar by gravity, and is disengaged from said shoulder by the release of either one of the tripping levers 20a. Hook 26 and springs are carried by and located within the casing 28 secured by screws 28tl to the top member of the door.

With the construction thus far described, the lifting bar is held in its elevated position, and the auxiliary bolts held retracted, by the fusible connection between the links. The fusible connection between the links may however, melt while the door is in open position, or it may be necessary in the event a fire should start with the door closed, to get into the room where the iire started for the recovery of something therein, and then close the door to prevent the lire from spreading, and under such conditions it is essential that means be provided for holding the auxiliary bolts retracted while the door is open, and for releasing them automatically upon closing the door, so as to lock the same'against warping. Such means are shown in Figs. 1, 3 and l, and consists of an L-shaped trip lever 29 pivoted to the inner wall of the front edge of the door, with its lower free edge projecting through an opening in one face of the door, in a posi* tion to engage the door jamb 30 when the door is closed. This lever 29 normally projects by gravity, through the side face of the door, and is provided adjacent its lower end with a lug 29a, adapted to engage the underside of the lifting bar stop 31, and hold the latter, together with the lifting bar to which the stop isl secured, elevated. This stop 31 is rigidly secured to the bar 6, and when the latter is lifted by a knob, the stop 31 will be in a plane above the lug 29l on lever 29, and remains there so long as the latch bolt is held retracted by a knob. As the door is opened, the projecting end of the lever 29 leaves the jamb and is then free to gravitate outwardly, thus carrying the lug 29a under the stop, so that when the knob is released, the lifting bar descends until the stop 31 rests on the lug 29, as shown in Fig. 3, thus holding' all the aux iliary bolts retracted. As the door comes to a close, the trip lever will be forced inwardly by contact with the jamb, thus carrying the lug 29a from under the stop, and freeing the latter, and permitting the lifting bar to drop by its own weight and project the bolts.

The main latch'7 is independent of the auxiliary bolts, and is at all times, and under all conditions, under the control of the inside knob, and also of the outside knob eX- cept when it is set or locked by a key from 'the outside.

It is evident that many slight changes might be resorted to in the relative arrangement of parts shown and described without departing from the spirit and scope of myl invention. Hence I would have it understood that I do not wish to confine myself to the exact construction and arrangement of parts shown and described, but

Having fully described my invention what I claim as new and desire to secure by Letters-Patent, is

1. In a bolt mechanism for doors, the combination of a latch bolt, means for operating the same, a series o-f connected secondary bolts, fusible means for holding the latter normally in inoperative position, and means for connecting said secondary bolts with .the main latch bolt so that when the said secondary bolts are released from the fusible means they may be retracted with the main latch bolt.

2. ln'bolt mechanism for doors, the combination with a door, a lifting bar carried by the door, a series of bolts and connections between the bolts and bar whereby the bolts are projected beyond the edge of the door by the downward movement of the bar, of means fo-r holding the bar elevated and fusible means for locking said holding means against movement.

3. In bolt mechanism for doors, the combination of a door, a series of bolts, means carried by the door and actuated by gravity for projecting the bolts beyond the edge of the door, means for holding said gravity means against movement and a fusible device for locking said holding means.

4L. In bolt mechanism for doors, the combination of a door, a series of bolts, a gravity lifting bar carried by the door, means connecting said bar and bolts whereby the latter will be projected beyond the edge of the door by the downward movement of the bar, means for holding said bar elevated, a spring actuated tripping device for releasing said bar and a fusible connection for holding the trip against movement under normal conditions.

5. In bolt mechanism for doors, the combination of a door, a series of bolts, a gravity lifting bar, means connecting said bar and bolts whereby the latter will be projected beyond the edge of the door by the downward movement of the bar, means for holding said bar elevated, spring actuated tripping devices for releasing the bar from the holding means, and a fusible device on each side of the door for holding said tripping devices against action underl normal condi-v tions.

6. ln bolt mechanism for doors, the combination of a door, a gravity lifting bar, a series of bolts carried by the door, means connecting the several bolts and the bar whereby they move in unison, means for lifting the bar whereby the bolts will be retracted, a lever for holding the bar elevated, two tripping levers for releasing the bar and fusible devices one on each side of the door for holding the tripping devices kagainst movement under normal conditions.

7. In bolt mechanism for doors, the combination of a knob mechanism, a series of connected bolts one of which is connected with said knob mechanism, and means includin g a fusible connection for holding all the bolts but the one connected with the knob mechanism, normally retracted.

8. yIn bolt mechanism for doors, the combination of a series of connected bolts adapted to be projected by gravity, fusible means for normally holding said bolts in inoperative position, a main latch bolt, means for operating same independently of the connected bolts and means whereby when the connected bolts are released they will be actuated by the main latch bolt mechanism.

9. 1n bolt mechanism, the combination of a main latch bolt, means for actuating same, a secondary bolt, fusible means for normally holding said secondary bolt in inoperative position, and means whereby when the secondary bolt is released, it will engage the mechanism of the main latch bolt and be operated simultaneously with the latter, the main bolt being free to operate independently of the secondary bolt when the latter is in its inoperative position.

l0. The combination with a door, a series of bolts adapted to be projected beyond the vedge of the door by gravity, of a holding means for supporting the bolts in their retracted position, a spring actuated device for tripping said holding means and a fusible device for normally holding said tripping means against movement.

11. The combination with a door, a series of bolts adapted to be projected beyond the edge of the door by gravity, of holding means for supporting the bolts in their retracted position, two spring actuated devices for tripping said holding means, and a fusible device for each tripping device, the said fusible device being located adjacent the opposite sides of the door for normally holding the tripping devices against moveient.

12. The combination with a vertically movable bar, a series of bolts andV bell cranks connecting the bolts and bar whereby the bolts are moved in unison with the bar, of a ios holding level engaging the uppermost bell Crank for holding the bau elevated and the bolts letraeted, a spring actuated tripping device 'for moving said holding lever out of Contact with its bell Crank lever und fusible means for normally holding Said tripping means, aganet movement.

In testimony whereof, I have Signed this speoleatlon 1n the presence of mvo subserlbing Witnesses. Y

CHARLES A. BERRY. VVtnesSes A. F. BARDWELL, GEO. VHITE.

Copies of this patent may be'obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

